Erebus handed Kael a small, delicate vial filled with a shimmering liquid.

Across various cultures and eras, mythology has frequently embraced figures that transcend the traditional gender binary, often blending male and female attributes to represent totality, creation, or divine transcendence. While the specific term you used is a modern and often controversial label, the concept of "trans-feminine" or androgynous deities is a recurring theme in human history. The Divine Androgyny: Blending the Binary

found throughout world mythology. These figures often represent the union of opposites, the transcendence of gender binaries, or the creative power of the universe.

By existing outside the binary, these gods represent a state of being that is superior to the limitations of mortal biology.